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1、BRITISH STANDARD BS EN ISO 1519:1995 BS 3900-E1: 1995 Paints and varnishes Bend test (cylindrical mandrel) The European Standard EN ISO 1519:1995 has the status of a British Standard Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:58:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO
2、1519:1995 This British Standard, having been prepared under the direction of the Sector Board for Materials and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 May 1995 BSI 02-1999 The following BSI references relate to the work on this standard: Commi
3、ttee reference STI/10 Draft announced in BSI News January 1995 ISBN 0 580 23800 8 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee STI/10 Test methods for paints, upon which the following bodies were represented: British C
4、oatings Federation Ltd. European Resin Manufacturers Association Health and Safety Executive Ministry of Defence National Centre of Tribology Oil and Colour Chemists Association Paint Research Association Titanium Pigment Manufacturers Technical Committee Amendments issued since publication Amd. No.
5、DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:58:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 1519:1995 BSI 02-1999i Contents Page Committees responsibleInside front cover National forewordii Foreword2 0Introduction3 1Scope and field of application3 2References3 3
6、Apparatus3 4Sampling4 5Test panels4 6Procedure4 7Test report5 Annex ZA (normative) Normative references to international publications with their relevant European publications8 Figure 1 Type 1 bend test apparatus6 Figure 2 Type 1 bend test apparatus in use6 Figure 3 Type 2 bend test apparatus6 Figur
7、e 4 Details of Type 2 bend test apparatus7 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:58:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 1519:1995 ii BSI 02-1999 National foreword This British Standard has been prepared by Technical Committee STI/10, and is the English languag
8、e version of EN ISO 1519:1995 Paints and varnishes Bend test (cylindrical mandrel), published by the European Committee for Standardization (CEN) which is identical with ISO 1519:1973 published by the International Organization for Standardization (ISO). This standard supersedes BS 3900-E1:1970 whic
9、h is withdrawn. The main differences between this standard and BS 3900-E1:1970 are: a) The temperature of test is now (23 2) C b) The relative humidity of the test is now (50 5) % A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards ar
10、e responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International standardCorresponding British Standard EN 21512:1994BS 3900 Methods of test for paints (ISO 1512:1991) Part A1:1992 Sampling ISO 2
11、808:1991Part C5:1991 Determination of film thickness EN ISO 1513:1994BS EN ISO 1513:1994 Paints and varnishes Examination and preparation of samples for testing Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN ISO title page, pages 2 to 8 and a ba
12、ck cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:58:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDAR
13、D NORME EUROPENNE EUROPISCHE NORM EN ISO 1519 March 1995 ICS 87.040 Descriptors: Paints, varnishes, tests, bend tests English version Paints and varnishes Bend test (cylindrical mandrel) (ISO 1519:1973) Peintures et vernis Essai de pliage sur mandrin cylindrique (ISO 1519:1973) Lacke und Anstrichsto
14、ffe Dornbiegeversuch (zylindrischer Dorn) (ISO 1519:1973) This European Standard was approved by CEN on 1995-01-05. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any
15、 alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by
16、translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxe
17、mbourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1995 Copyright reserved to CEN members Ref. No. EN I
18、SO 1519:1995 E Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:58:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 1519:1995 BSI 02-1999 2 Foreword This European Standard has been taken over by the Technical Committee CEN/TC 139, Paints and varnishes, from the work of ISO/TC 35, Paints
19、 and varnishes, of the International Organization for Standardization (ISO). This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 1995, and conflicting national standards shall be withdrawn a
20、t the latest by September 1995. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Sw
21、itzerland, United Kingdom. NOTENormative references to international publications are listed in Annex ZA (normative). Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:58:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 1519:1995 BSI 02-19993 0 Introduction This International Standard is
22、 one of a series dealing with the sampling and testing of paints, varnishes and related products. It should be read in conjunction with ISO 1512, ISO 1513, and ISO 1514. This International Standard is one of three which specify empirical test procedures for assessing the resistance of coatings of pa
23、ints, varnishes and related products to cracking and/or detachment from the substrate under different conditions of deformation. The other two of these documents are ISO 1520, Paints and varnishes Cupping test, and ISO 1) Paints and varnishes Rapid deformation test. The method of test specified requ
24、ires to be completed, for any particular application, by the following supplementary information. This information should be derived from the national standard or other document for the product under test or, where appropriate, should be the subject of agreement between the interested parties. a) Na
25、ture, thickness and surface preparation of substrate. b) Apparatus to be used (i.e. Type 1 or Type 2). c) Method of application of test coating to substrate. d) Thickness, in micrometres, of the dry coating, including method of measurement, and whether it is a single coating or a multicoat system. e
26、) Duration and conditions of drying of the coated panel before testing (or conditions of stoving and ageing, if applicable). f) Specified size of mandrel, if applicable, to be used in the test. g) Temperature at which the test is to be carried out. 1 Scope and field of application 1.1 This Internati
27、onal Standard specifies an empirical test procedure for assessing the resistance of a coating of paint, varnish or related product to cracking and/or detachment from a metal substrate when subjected to bending round a cylindrical mandrel under standard conditions. 1.2 For a multicoat system, each co
28、at may be tested separately or the complete system may be tested. 1.3 The method specified may be carried out either as a “go/no go” test, by carrying out the test with a single specified size of mandrel, to assess compliance with a particular requirement or by repeating the procedure using successi
29、vely smaller mandrels to determine the diameter of the first mandrel over which the coating cracks and/or becomes detached from the substrate. 1.4 Two types of apparatus are specified, Type 1 being appropriate for use on test panels of thickness up to 0,3 mm, and Type 2 for use on test panels of thi
30、ckness up to 1,0 mm. Both types of apparatus have been found to give similar results with the same coating, but normally only one will be used for testing a given product. 2 References ISO 1512, Paints and varnishes Sampling. ISO 1513, Paints and varnishes Examination and preparation of samples for
31、testing. ISO 1514, Paints and varnishes Standard panels for testing. ISO 2808, Paints and varnishes Determination of film thickness. 3 Apparatus 3.1 Bend test apparatus 3.1.1 Material In both types of apparatus specified below, the mandrels shall be made of a rigid and suitably corrosion-resistant m
32、aterial, for example stainless steel. 3.1.2 Type 1 apparatus A suitable apparatus is shown in Figure 1 and Figure 2 and is used with test panels of thickness not greater than 0,3 mm. A set of hinges is provided, each incorporating a cylindrical mandrel; the diameters of the mandrels are 2, 3, 4, 5,
33、6, 8, 10, 12, 16, 20, 25 and 32 mm respectively2). The dimensions of the apparatus are not critical, except that the gap between the surface of the mandrel and the plates of the hinges shall be 0,55 0,05 mm. The mandrel shall be free to rotate on its axis and the apparatus shall be provided with a s
34、top to ensure that when the test panel is bent, the two portions are parallel. 1) In preparation. (See ISO/TR 6272) 2) Especially with the 2 mm diameter mandrel, it is important to ensure that no distortion of the mandrel takes place during the bending process, and not to use any mandrel showing suc
35、h distortion. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:58:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 1519:1995 4 BSI 02-1999 3.1.3 Type 2 apparatus A suitable apparatus is shown in Figure 3 and Figure 4 and is normally used with test panels of thickness up to 1,0 mm. With
36、soft metals, for example aluminium, thicker panels may be used provided there is no distortion of the mandrel. The apparatus incorporates one of a series of cylindrical mandrels of diameters 6, 10 and 13 mm3). 3.2 Controlled temperature chamber This is required for tests which are specified to be ca
37、rried out at temperatures other than 23 2 C. It consists of an oven or refrigerator in which the temperature of the working chamber can be controlled to within 1 C of the required test temperature, and fitted with the following ancillary equipment: a) a circulation fan in the working chamber; b) a s
38、uitable remote-control device by which the panel can be bent without opening the test chamber; c) a temperature indicating or recording device located with its bulb or sensitive element in close proximity to the coating under test. 4 Sampling A representative sample of the product to be tested (or o
39、f each product in the case of a multicoat system) shall be taken as specified in ISO 1512. The sample shall then be examined and prepared for testing as specified in ISO 1513. 5 Test panels 5.1 Material Unless otherwise specified or agreed, the test panels shall be of burnished steel, burnished tinp
40、late or soft aluminium complying with the requirements of ISO 1514. 5.2 General The test panels shall be flat and free from distortion and the surface shall be free from any visible ridges or cracks. 5.3 Dimensions The test panels shall be rectangular and approximately 100 mm 50 mm in size and eithe
41、r 0,3 mm (for use with Type 1 apparatus) or 1,0 mm (for use with Type 2 apparatus) thick, unless otherwise specified. The test panels may be cut to size after coating and drying, provided no distortion occurs. In the case of aluminium panels, the longer side shall be parallel to the longitudinal dir
42、ection of metallurgical rolling. 5.4 Preparation and coating of panels The test panels shall be prepared in accordance with ISO 1514, unless otherwise specified, and shall then be coated by the specified method with the product under test. If the product under test is applied by brushing, the brush
43、marks shall be parallel to the longer side of the panel. 5.5 Thickness of coating The thickness, in micrometres, of the dry coating shall be determined by the method specified, using one of the procedures specified in ISO 2808. 6 Procedure 6.1 General 6.1.1 Drying the test panel The coated test pane
44、ls shall be dried (or stoved and aged) for the specified time and, unless otherwise specified, shall be conditioned at a temperature of 23 2 C and 50 5 % relative humidity for a minimum period of 16 h. The appropriate test procedure shall then be carried out as soon as possible. 6.1.2 Ambient condit
45、ions The test shall be carried out at a temperature of 23 2 C and 50 5 % relative humidity, unless otherwise specified. 6.1.3 Handling the test panel Warming the test panel by undue handling shall be avoided. 6.2 Procedure for a single specified size of mandrel The appropriate procedure given in 6.2
46、.1, 6.2.2 or 6.2.3 shall be carried out on two separate test panels and the panels shall then be examined as specified in 6.2.4 (if the results differ, additional tests shall be made). 6.2.1 Tests with the Type 1 apparatus at 23 2 C Fully open the apparatus, fitted with the appropriate mandrel, and
47、insert the panel so that it may subsequently be bent with the coated side outwards. Close the apparatus evenly without jerking, over a period of from 1 to 2 s, thus bending the panel over the mandrel through 180. 3) By agreement between the interested parties, other diameters of mandrel may be used
48、with the Type 2 apparatus. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:58:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 1519:1995 BSI 02-19995 6.2.2 Tests with the Type 2 apparatus at 23 2 C Firmly secure the apparatus near the edge of a bench so that the handle can be operated
49、freely. Lower the panel holder by withdrawing the wedge and use the adjusting screw to move the bending piece away from the mandrel position. Fit the apparatus with the appropriate mandrel. Lower the handle into a vertical position and then insert the panel, painted side down, between the mandrel and the bending piece, until approximately 40 mm of the panel protrudes when measured from the mandrel centre line towards the bending piece. Clamp the panel firmly to the panel holder using the lock nuts and plate